User753101303 posted
Hi,
The purpose being? You want to use 127.0.0.1 rather than localhost? Try
https://cyanbyfuchsia.wordpress.com/2014/07/29/make-iis-express-works-with-http127-0-0-1/
In short when an http query is received by a web server, the web server is trying to find the 'first site that is matching::
- the ip address
- the "host header name" ie "localhost" or "site.company.com"
- the port
Using the hiost header name is convenient as it allows to easily have multiple sites with a single IP address.